import React from "react";

import Link from "next/link";
import { useRouter } from "next/router";

import useSWR, { mutate } from "swr";

// services
import cyclesService from "services/cycles.service";
// hooks
import useToast from "hooks/use-toast";
// ui
import { LinearProgressIndicator, Loader, Tooltip } from "components/ui";
import { AssigneesList } from "components/ui/avatar";
import { SingleProgressStats } from "components/core";
// components
import ProgressChart from "components/core/sidebar/progress-chart";
import { ActiveCycleProgressStats } from "components/cycles";

// icons
import { CalendarDaysIcon } from "@heroicons/react/20/solid";
import { getPriorityIcon } from "components/icons/priority-icon";
import {
  TargetIcon,
  ContrastIcon,
  PersonRunningIcon,
  ArrowRightIcon,
  TriangleExclamationIcon,
  AlarmClockIcon,
  LayerDiagonalIcon,
  CompletedStateIcon,
} from "components/icons";
import { StarIcon } from "@heroicons/react/24/outline";
// helpers
import {
  getDateRangeStatus,
  renderShortDateWithYearFormat,
  findHowManyDaysLeft,
} from "helpers/date-time.helper";
import { truncateText } from "helpers/string.helper";
// types
import { ICycle, IIssue } from "types";
// fetch-keys
import { CURRENT_CYCLE_LIST, CYCLES_LIST, CYCLE_ISSUES_WITH_PARAMS } from "constants/fetch-keys";

const stateGroups = [
  {
    key: "backlog_issues",
    title: "Backlog",
    color: "#dee2e6",
  },
  {
    key: "unstarted_issues",
    title: "Unstarted",
    color: "#26b5ce",
  },
  {
    key: "started_issues",
    title: "Started",
    color: "#f7ae59",
  },
  {
    key: "cancelled_issues",
    title: "Cancelled",
    color: "#d687ff",
  },
  {
    key: "completed_issues",
    title: "Completed",
    color: "#09a953",
  },
];

export const ActiveCycleDetails: React.FC = () => {
  const router = useRouter();
  const { workspaceSlug, projectId } = router.query;

  const { setToastAlert } = useToast();

  const { data: currentCycle } = useSWR(
    workspaceSlug && projectId ? CURRENT_CYCLE_LIST(projectId as string) : null,
    workspaceSlug && projectId
      ? () =>
          cyclesService.getCyclesWithParams(workspaceSlug as string, projectId as string, "current")
      : null
  );
  const cycle = currentCycle ? currentCycle[0] : null;

  const { data: issues } = useSWR(
    workspaceSlug && projectId && cycle?.id
      ? CYCLE_ISSUES_WITH_PARAMS(cycle?.id, { priority: "urgent,high" })
      : null,
    workspaceSlug && projectId && cycle?.id
      ? () =>
          cyclesService.getCycleIssuesWithParams(
            workspaceSlug as string,
            projectId as string,
            cycle.id,
            { priority: "urgent,high" }
          )
      : null
  ) as { data: IIssue[] | undefined };

  if (!currentCycle)
    return (
      <Loader>
        <Loader.Item height="250px" />
      </Loader>
    );

  if (!cycle)
    return (
      <div className="flex w-full items-center justify-start rounded-[10px] bg-custom-background-80 px-6 py-4">
        <h3 className="text-base font-medium text-custom-text-100 ">无活动周期</h3>
      </div>
    );

  const endDate = new Date(cycle.end_date ?? "");
  const startDate = new Date(cycle.start_date ?? "");

  const groupedIssues: any = {
    backlog: cycle.backlog_issues,
    unstarted: cycle.unstarted_issues,
    started: cycle.started_issues,
    completed: cycle.completed_issues,
    cancelled: cycle.cancelled_issues,
  };

  const cycleStatus = getDateRangeStatus(cycle.start_date, cycle.end_date);

  const handleAddToFavorites = () => {
    if (!workspaceSlug || !projectId || !cycle) return;

    mutate<ICycle[]>(
      CURRENT_CYCLE_LIST(projectId as string),
      (prevData) =>
        (prevData ?? []).map((c) => ({
          ...c,
          is_favorite: c.id === cycle.id ? true : c.is_favorite,
        })),
      false
    );

    mutate(
      CYCLES_LIST(projectId as string),
      (prevData: any) =>
        (prevData ?? []).map((c: any) => ({
          ...c,
          is_favorite: c.id === cycle.id ? true : c.is_favorite,
        })),
      false
    );

    cyclesService
      .addCycleToFavorites(workspaceSlug as string, projectId as string, {
        cycle: cycle.id,
      })
      .catch(() => {
        setToastAlert({
          type: "error",
          title: "错误!",
          message: "无法将周期添加到收藏夹。请重试。",
        });
      });
  };

  const handleRemoveFromFavorites = () => {
    if (!workspaceSlug || !projectId || !cycle) return;

    mutate<ICycle[]>(
      CURRENT_CYCLE_LIST(projectId as string),
      (prevData) =>
        (prevData ?? []).map((c) => ({
          ...c,
          is_favorite: c.id === cycle.id ? false : c.is_favorite,
        })),
      false
    );

    mutate(
      CYCLES_LIST(projectId as string),
      (prevData: any) =>
        (prevData ?? []).map((c: any) => ({
          ...c,
          is_favorite: c.id === cycle.id ? false : c.is_favorite,
        })),
      false
    );

    cyclesService
      .removeCycleFromFavorites(workspaceSlug as string, projectId as string, cycle.id)
      .catch(() => {
        setToastAlert({
          type: "error",
          title: "错误!",
          message: "无法从收藏夹中删除周期。请重试。",
        });
      });
  };

  const progressIndicatorData = stateGroups.map((group, index) => ({
    id: index,
    name: group.title,
    value:
      cycle.total_issues > 0
        ? ((cycle[group.key as keyof ICycle] as number) / cycle.total_issues) * 100
        : 0,
    color: group.color,
  }));

  return (
    <div className="grid-row-2 grid rounded-[10px] shadow divide-y bg-custom-background-100 border border-custom-border-200">
      <div className="grid grid-cols-1 divide-y border-custom-border-200 lg:divide-y-0 lg:divide-x lg:grid-cols-3">
        <div className="flex flex-col text-xs">
          <div className="h-full w-full">
            <div className="flex h-60 flex-col gap-5 justify-between rounded-b-[10px] p-4">
              <div className="flex items-center justify-between gap-1">
                <span className="flex items-center gap-1">
                  <span className="h-5 w-5">
                    <ContrastIcon
                      className="h-5 w-5"
                      color={`${
                        cycleStatus === "current"
                          ? "#09A953"
                          : cycleStatus === "upcoming"
                          ? "#F7AE59"
                          : cycleStatus === "completed"
                          ? "#3F76FF"
                          : cycleStatus === "draft"
                          ? "rgb(var(--color-text-200))"
                          : ""
                      }`}
                    />
                  </span>
                  <Tooltip tooltipContent={cycle.name} position="top-left">
                    <h3 className="break-words text-lg font-semibold">
                      {truncateText(cycle.name, 70)}
                    </h3>
                  </Tooltip>
                </span>
                <span className="flex items-center gap-1 capitalize">
                  <span
                    className={`rounded-full px-1.5 py-0.5
                    ${
                      cycleStatus === "current"
                        ? "bg-green-600/5 text-green-600"
                        : cycleStatus === "upcoming"
                        ? "bg-orange-300/5 text-orange-300"
                        : cycleStatus === "completed"
                        ? "bg-blue-500/5 text-blue-500"
                        : cycleStatus === "draft"
                        ? "bg-neutral-400/5 text-neutral-400"
                        : ""
                    }`}
                  >
                    {cycleStatus === "current" ? (
                      <span className="flex gap-1 whitespace-nowrap">
                        <PersonRunningIcon className="h-4 w-4" />
                        {findHowManyDaysLeft(cycle.end_date ?? new Date())} Days Left
                      </span>
                    ) : cycleStatus === "upcoming" ? (
                      <span className="flex gap-1 whitespace-nowrap">
                        <AlarmClockIcon className="h-4 w-4" />
                        {findHowManyDaysLeft(cycle.start_date ?? new Date())} Days Left
                      </span>
                    ) : cycleStatus === "completed" ? (
                      <span className="flex gap-1 whitespace-nowrap">
                        {cycle.total_issues - cycle.completed_issues > 0 && (
                          <Tooltip
                            tooltipContent={`${
                              cycle.total_issues - cycle.completed_issues
                            } more pending ${
                              cycle.total_issues - cycle.completed_issues === 1 ? "issue" : "issues"
                            }`}
                          >
                            <span>
                              <TriangleExclamationIcon className="h-3.5 w-3.5 fill-current" />
                            </span>
                          </Tooltip>
                        )}{" "}
                        Completed
                      </span>
                    ) : (
                      cycleStatus
                    )}
                  </span>
                  {cycle.is_favorite ? (
                    <button
                      onClick={(e) => {
                        e.preventDefault();
                        handleRemoveFromFavorites();
                      }}
                    >
                      <StarIcon className="h-4 w-4 text-orange-400" fill="#f6ad55" />
                    </button>
                  ) : (
                    <button
                      onClick={(e) => {
                        e.preventDefault();
                        handleAddToFavorites();
                      }}
                    >
                      <StarIcon className="h-4 w-4 " color="rgb(var(--color-text-200))" />
                    </button>
                  )}
                </span>
              </div>

              <div className="flex items-center justify-start gap-5 text-custom-text-200">
                <div className="flex items-start gap-1">
                  <CalendarDaysIcon className="h-4 w-4" />
                  <span>{renderShortDateWithYearFormat(startDate)}</span>
                </div>
                <ArrowRightIcon className="h-4 w-4 text-custom-text-200" />
                <div className="flex items-start gap-1">
                  <TargetIcon className="h-4 w-4" />
                  <span>{renderShortDateWithYearFormat(endDate)}</span>
                </div>
              </div>

              <div className="flex items-center gap-4">
                <div className="flex items-center gap-2.5 text-custom-text-200">
                  {cycle.owned_by.avatar && cycle.owned_by.avatar !== "" ? (
                    <img
                      src={cycle.owned_by.avatar}
                      height={16}
                      width={16}
                      className="rounded-full"
                      alt={cycle.owned_by.first_name}
                    />
                  ) : (
                    <span className="flex h-5 w-5 items-center justify-center rounded-full bg-custom-background-100 capitalize">
                      {cycle.owned_by.first_name.charAt(0)}
                    </span>
                  )}
                  <span className="text-custom-text-200">{cycle.owned_by.first_name}</span>
                </div>

                {cycle.assignees.length > 0 && (
                  <div className="flex items-center gap-1 text-custom-text-200">
                    <AssigneesList users={cycle.assignees} length={4} />
                  </div>
                )}
              </div>

              <div className="flex items-center gap-4 text-custom-text-200">
                <div className="flex gap-2">
                  <LayerDiagonalIcon className="h-4 w-4 flex-shrink-0" />
                  {cycle.total_issues} issues
                </div>
                <div className="flex gap-2">
                  <CompletedStateIcon width={16} height={16} color="#438AF3" />
                  {cycle.completed_issues} issues
                </div>
              </div>

              <Link href={`/${workspaceSlug}/projects/${projectId}/cycles/${cycle.id}`}>
                <a className="bg-custom-primary text-white px-4 rounded-md py-2 text-center text-sm font-medium w-full hover:bg-custom-primary/90">
                  View Cycle
                </a>
              </Link>
            </div>
          </div>
        </div>
        <div className="grid col-span-2 grid-cols-1 divide-y border-custom-border-200 md:divide-y-0 md:divide-x md:grid-cols-2">
          <div className="flex h-60 flex-col border-custom-border-200">
            <div className="flex h-full w-full flex-col text-custom-text-200 p-4">
              <div className="flex w-full items-center gap-2 py-1">
                <span>Progress</span>
                <LinearProgressIndicator data={progressIndicatorData} />
              </div>
              <div className="flex flex-col mt-2 gap-1 items-center">
                {Object.keys(groupedIssues).map((group, index) => (
                  <SingleProgressStats
                    key={index}
                    title={
                      <div className="flex items-center gap-2">
                        <span
                          className="block h-3 w-3 rounded-full "
                          style={{
                            backgroundColor: stateGroups[index].color,
                          }}
                        />
                        <span className="text-xs capitalize">{group}</span>
                      </div>
                    }
                    completed={groupedIssues[group]}
                    total={cycle.total_issues}
                  />
                ))}
              </div>
            </div>
          </div>
          <div className="border-custom-border-200 h-60 overflow-y-scroll">
            <ActiveCycleProgressStats cycle={cycle} />
          </div>
        </div>
      </div>
      <div className="grid grid-cols-1 divide-y border-custom-border-200 lg:divide-y-0 lg:divide-x lg:grid-cols-2">
        <div className="flex flex-col justify-between p-4">
          <div>
            <div className="text-custom-primary">High Priority Issues</div>
            <div className="my-3 flex max-h-[240px] min-h-[240px] flex-col gap-2.5 overflow-y-scroll rounded-md">
              {issues ? (
                issues.length > 0 ? (
                  issues.map((issue) => (
                    <div
                      key={issue.id}
                      className="flex flex-wrap rounded-md items-center justify-between gap-2 border border-custom-border-200 bg-custom-background-90 px-3 py-1.5"
                    >
                      <div className="flex flex-col gap-1">
                        <div>
                          <Tooltip
                            tooltipHeading="Issue ID"
                            tooltipContent={`${issue.project_detail?.identifier}-${issue.sequence_id}`}
                          >
                            <span className="flex-shrink-0 text-xs text-custom-text-200">
                              {issue.project_detail?.identifier}-{issue.sequence_id}
                            </span>
                          </Tooltip>
                        </div>
                        <Tooltip
                          position="top-left"
                          tooltipHeading="Title"
                          tooltipContent={issue.name}
                        >
                          <span className="text-[0.825rem] text-custom-text-100">
                            {truncateText(issue.name, 30)}
                          </span>
                        </Tooltip>
                      </div>
                      <div className="flex items-center gap-1.5">
                        <div
                          className={`grid h-6 w-6 place-items-center items-center rounded border shadow-sm flex-shrink-0 ${
                            issue.priority === "urgent"
                              ? "border-red-500/20 bg-red-500/20 text-red-500"
                              : "border-orange-500/20 bg-orange-500/20 text-orange-500"
                          }`}
                        >
                          {getPriorityIcon(issue.priority, "text-sm")}
                        </div>
                        {issue.label_details.length > 0 ? (
                          <div className="flex flex-wrap gap-1">
                            {issue.label_details.map((label) => (
                              <span
                                key={label.id}
                                className="group flex items-center gap-1 rounded-2xl border border-custom-border-200 px-2 py-0.5 text-xs text-custom-text-200"
                              >
                                <span
                                  className="h-1.5 w-1.5  rounded-full"
                                  style={{
                                    backgroundColor:
                                      label?.color && label.color !== "" ? label.color : "#000",
                                  }}
                                />
                                {label.name}
                              </span>
                            ))}
                          </div>
                        ) : (
                          ""
                        )}
                        <div className={`flex items-center gap-2 text-custom-text-200`}>
                          {issue.assignees &&
                          issue.assignees.length > 0 &&
                          Array.isArray(issue.assignees) ? (
                            <div className="-my-0.5 flex items-center justify-center gap-2">
                              <AssigneesList
                                users={issue.assignee_details}
                                length={3}
                                showLength={false}
                              />
                            </div>
                          ) : (
                            ""
                          )}
                        </div>
                      </div>
                    </div>
                  ))
                ) : (
                  <div className="grid place-items-center text-custom-text-200 text-sm text-center">
                    No issues present in the cycle.
                  </div>
                )
              ) : (
                <Loader className="space-y-3">
                  <Loader.Item height="50px" />
                  <Loader.Item height="50px" />
                  <Loader.Item height="50px" />
                </Loader>
              )}
            </div>
          </div>

          {issues && issues.length > 0 && (
            <div className="flex items-center justify-between gap-2">
              <div className="h-1 w-full rounded-full bg-custom-background-80">
                <div
                  className="h-1 rounded-full bg-green-600"
                  style={{
                    width:
                      issues &&
                      `${
                        (issues.filter((issue) => issue?.state_detail?.group === "completed")
                          ?.length /
                          issues.length) *
                          100 ?? 0
                      }%`,
                  }}
                />
              </div>
              <div className="w-16 text-end text-xs text-custom-text-200">
                {issues?.filter((issue) => issue?.state_detail?.group === "completed")?.length} of{" "}
                {issues?.length}
              </div>
            </div>
          )}
        </div>
        <div className="flex flex-col justify-between border-custom-border-200 p-4">
          <div className="flex items-start justify-between gap-4 py-1.5 text-xs">
            <div className="flex items-center gap-3 text-custom-text-100">
              <div className="flex items-center justify-center gap-1">
                <span className="h-2.5 w-2.5 rounded-full bg-[#a9bbd0]" />
                <span>Ideal</span>
              </div>
              <div className="flex items-center justify-center gap-1">
                <span className="h-2.5 w-2.5 rounded-full bg-[#4c8fff]" />
                <span>Current</span>
              </div>
            </div>
            <div className="flex items-center gap-1">
              <span>
                <LayerDiagonalIcon className="h-5 w-5 flex-shrink-0 text-custom-text-200" />
              </span>
              <span>
                Pending Issues -{" "}
                {cycle.total_issues - (cycle.completed_issues + cycle.cancelled_issues)}
              </span>
            </div>
          </div>
          <div className="relative h-64">
            <ProgressChart
              distribution={cycle.distribution.completion_chart}
              startDate={cycle.start_date ?? ""}
              endDate={cycle.end_date ?? ""}
              totalIssues={cycle.total_issues}
            />
          </div>
        </div>
      </div>
    </div>
  );
};
